function setActiveStyleSheet(title) {
  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
      a.disabled = true;

	  if(a.getAttribute("title") == title) {

      	a.disabled = false;
      	a.disabled = true;
      	a.disabled = false;

      }
    }
  }
}


function getActiveStyleSheet() {

  var i, a;

  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
  }
  return null;
}



function getPreferredStyleSheet() {

  var i, a;

  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {

    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return null;
}


function createCookie(name,value,days) {

  if (days) {

    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }

  else expires = "";

  document.cookie = name+"="+value+expires+"; path=/";
}



function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');

  for(var i=0;i < ca.length;i++) {
    var c = ca[i];

    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }

  return null;
}



window.onload = function(e) {

  var cookie = readCookie(siteid);
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
}


window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie(siteid, title, 365);
}



var cookie = readCookie(siteid);
var title = cookie ? cookie : getPreferredStyleSheet();
var siteid = 'ice-styleswitcher';
setActiveStyleSheet(title);
